Square Washer 1)Material: Carbon,stainless steel 2)Size: Un-finite 3) ... ,ZB,ZY,Nickel, ZP.else 4)Tolerance:0.01 Square Washer 1) Standard: DIN, BS, IFI, JIS, ISO,GB,ANSI,ASME ... ,Mechanical Galvanizing, Hot-dip Galvanizing.etc.5) Shape: round , square , curved , taper, cup, bowl or according to your request.6) Surface ...